scheme/webauthn.c in Glewlwyd SSO server before 2.7.6 has a possible buffer overflow…
Priority MEDIUM 51CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
scheme/webauthn.c in Glewlwyd SSO server before 2.7.6 has a possible buffer overflow during FIDO2 credentials validation in webauthn registration.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00882 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:glewlwyd_sso_server_project:glewlwyd_sso_server:*:*:*:*:*:*:*:* | before 2.7.6 | Vulnerable | Glewlwyd Sso Server Project |
- cpe:2.3:a:glewlwyd_sso_server_project:glewlwyd_sso_server:*:*:*:*:*:*:*:* Versions before 2.7.6 Vulnerable ·Glewlwyd Sso Server Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-49208
- 2026-10-03 Alias added: GHSA-x7rh-wvh4-cx6x
References
More Glewlwyd Sso Server Project Glewlwyd Sso Server vulnerabilities
- TI-2022-10359 scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion. CVSS 3.1CRITICAL 9.8
- TI-2021-17746 scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2… CVSS 3.1CRITICAL 9.8
- TI-2024-16921 Glewlwyd SSO server 2.x through 2.7.6 allows open redirection via redirect_uri. CVSS 3.1MEDIUM 6.1
Sources
- CVE-2023-49208 · CVE Program
- CVE-2023-49208 · NVD
- FIRST EPSS
- GHSA-x7rh-wvh4-cx6x · GitHub Advisory Database · CC BY 4.0
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